Portable tray for attachment to a beach umbrella



FIG. 1 is a perspective view of a portable tray for attachment to a beach umbrella showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a top plan view thereof. 

The ornamental design for a portable tray for attachment to a beach umbrella, as shown and described. 